储热水罐斜温层的模拟与研究
Simulation and research on thermocline in hot water storage tanks
摘要：
冬季初、末寒期燃气锅炉供热量较小，导致用于烟气余热回收的热泵频繁启停而造成能源浪费。为了延长热泵的运行时间，可以在供热系统中增加储热水罐。通过建立简化模型，对储热水罐斜温层进行了模拟研究，分析了布水器入口流速及进出口温差对斜温层厚度的影响。结合实际工程，对储热水罐斜温层进行了测试。
Abstract：
The heat supply of gas boilers in the early and late winter cold periods is small, resulting in frequent start and stop of heat pumps for flue gas waste heat recovery, and resulting in energy waste. In order to extend the running time of the heat pump, it is possible to add hot water storage tanks to the heating system. In this paper, a simplified model is established to simulate the thermocline of the hot water storage tank, and the influence of the inlet flow rate and the temperature difference between the inlet and outlet of the water distributor on the thickness of the thermocline is analysed. Combined with the actual project, the thermocline of the hot water storage tank is tested.
Keywords:hot water storage tank; thermocline; simulation; heating system; heat pump; waste heat recovery